Priming-cup



.W. GRIKSCHEIT.

` PRIMING CUP. APPLICATION FILED APR. 16. 1919.

Patented Mays, 1921.

y tkrmuf UNITED STATES WILLIAM GRIKSCHEIT, F DETROIT, MICHIGAN.

PRIMING-CUP.

Specification of Letters Patent.

Patented May 3, 1921.

Substitute for application Serial No. 177,684, filed .Tune 29, 1917. This application filed April 16, 1919. Serial No. 290,489.

' To @ZZ whom t may concern:

Be it known that I, lVILLmM Gninsonnrr, a citizen of the United States of America, residing at Detroit, in the county of Vayne and State of Michigan, have invented certain new and useful Improvements in Priming-Cups, of which the following is a speciication, reference being had therein to the accompanying drawings.

rIhe invention relates to priming cups and the present application is filed as a substitute for allowed application Serial No. 177,684, filed June 29, 1917.

It is the primary object of the invention to provide a dust-proof cap for the cup which is easily opened and closed and when closed will be retained from accidental displacement.

In the drawings:

Figure l is an elevation of the cup 1n position for application to a V-type motor;

Fig. 2 is a similar view as arranged for a-horizontal motor;

Fig. 8 is a longitudinal section through a slightly modied construction in position for a vertical motor; and

Fig. 4l is a plan view of the construction shown in Fig. 3.

Fig. 5 is a view similar to Fig. 3 showing a modified construction;

Fig. 6 is a sectional plan view thereof.

A is the casing which is formed with a threaded nipple B at its lower end for engagement with the engine casing and is provided with a longitudinal bore C. D is a lateral angling projection which is hollow and forms the cup. The passage E which extends from the bottom of the cup inter'- sects the longitudinal bore C and below the pointof intersection is formed a valve seat F preferably by counterboring the upper is a cap or cover which is apertured to engage the stem G and is yieldably pressed against the cup by a spring J sleeved upon the stem. The cover I is formed with a rounded depressed portion I which fits within the mouth of the cup and is held therein by the tension of the spring J. Thus m opening or closing the cup the rounded portion of the cover in passing over the edge of the cup will compress the spring and will therefore snap into a position ofregistration. Thus there will 'be no danger of accidental displacement for the cover cannot move laterally without compressing the spring.

The construction as described may be manufactured at small cost and may be applied to either the vertical, horizontal or V- type motors without change. The fact that the cup is normally covered will exclude dust and dirt and will therefore prevent its introduction into the engine cylinder or upon the valve seat.

For many uses of the priming cup it is desirable to lock the stem so that it cannot be accidentally disengaged by the vibration of the motor. For instance, where the cups are used on aeroplane engines the disenga ement of the stem might be the cause o a serious accident. I have therefore provided a locking means, shown in Figs. 5 and 6, of the following construction: l

The stem G is formed with an undercut portion or annular recess K, as shown in Fig. 5, and L isa retaining pin inserted throughl an aperture in the casing into said recess. To retain the pin from disengagement the aperture M, through which it is inserted, is preferably arranged tangentially in relation to the recess K. The pin L is thenA inserted through this aperture and upon striking the opposite wall of the casing will be deflected and bent about the stem into the hooked form shown in Fig. 6. When thus inserted it will be impossible to accidentally disengage the pin and the latter can only be removed by suliicient pulling force to again straighten it out. other hand, as long as the pin is in the recess it will be impossible to disengage the stem.

What I claim as my invention is:

l. A priming cup, comprising a casing having a longitudinal bore therethrough, a cup communicating with said bore and have formed the following construction: I a threaded stem engaging corresponding threads in said bore and seated to out oil communication with said cup, a sheet metal cap apertured to engage said stem and having a rounded depressed portion for engaging the mouth of the cup, and aspring sleeved upon said stem bearing against said cap and yieldably holding the same from disengagement from said cup. l

2. AV priming cup, comprising a casing having a longitudinal bore therethrough and a cup portion communicating With said bore, a threaded stem for engaging internal threads in said bore and seated to cut off communication with said cup, and a sheet metal cap apertured ior the passage of said stem and having a depressed portion for tting Within the mouth of said cup to be held thereby in registration, and a spring sleeved on said stem bearing against said cap to place a yieldable tension thereon whereby it is caused to snap into register ing engagement with the cup and is retained from displacement,

3. A priming cup, comprising a casing having a longitudinal bore therethrough and a cup communicating with said bore, a threaded stem for engaging said bore and seated to cut off communication with said cup, a sheet metal cap' having a'portion depressed to lit'vvithin the mouth of said cup and an angling portion apertured to engage said stem, and a spring sleeved on said stem bearing against saidcap to yieldably hold the same from displacement and to form a snap engagement.

4. A priming cup, comprising a casing having a longitudinal bore extending there through and formed at one side 'of said bore with a cup, the top of which has an acute angular relation to said bore and further formed With a discharge opening from the bottoni of said cup to said bore, a valve controlling communication of said cup With said bore, the stem thereof having engagement with a threaded portion of the bore and having a portion projecting eXteriorly of the casing, a cap for said cup bent to form a closure portion parallel to the top of the cup, and a pivotal portion transverse with the rprojecting portion of the stem and pivoted thereupon, and a spring mounted upon the stem bearing upon said cover to maintain the same normally closed.

5. The combination with a casing having a bore therein with a threaded portion, of a stem inserted in said bore and threaded to engage the threaded portion thereof, said tem having a shank portion of lesser diameter than said bore, and a pin inserted through an aperture in one Wall of said casing and bent about said shank portion.

G. The combination With a casing having a bore therein with a threaded inner portion and an unthreaded outer portion, of a stern threaded to engage the threaded portion of said bore and having a shank por tion oi lesser diameter than the unthreaded portion of said bore, and a pin inserted through an aperture in one Wall ot said easing and bent about a portion of said shank.

7. The combination With a casing having a bore therein with a threaded inner portion and an unthreaded outer portion, of a stern threaded to engage the threaded portion of said bore and having a shank portion oit lesser diameter than the unthreaded Yportion ot' said bore, and a pin inserted through an aperture in one Wall o'f said casing tangentially in relation to the space between said shank and casing, said pin being bent about a portion of the shank and forming retainer for preventing disengagement oii the stem.

8. r'llhe combination with a casing having bore therein with a threaded portion, of a stem inserted in said bore and threaded to engage the threaded portion thereof, said stem having a shank portion intermediate ends oi"- less diameter than the same, and a pin inserted through an aperture in one wall oi said easing and engaging said shank portion to retain the same from complete disengagement from said casing, the Width or said pin being less than that of said shank portion.

i). rhe combination With a casing having a bore therein AWith a threaded portion, of a stem inserted in `said bore and threaded to engage the threaded portion thereof, said stem having a shank portion intermediate its ends of less diameter than the same, and means upon the Wall or said casing engaging said shank portion to limit the longitudinal movement oi the stem, said means being of less Width than said shank portion.

ln testimony whereof I affix my signature.

VILLIAM GRIKSCHEIT. 

